Pasta with Lamb and Mint-Pistachio Pesto

Name: Pasta with Lamb and Mint-Pistachio Pesto
Yield: Serves 4
Cuisine: Italian
Ingredients: 2 cups, fresh mint leaves; ½ cup plus 1 tablespoon, extra-virgin olive oil, divided; ½ cup, shelled pistachios, toasted and chopped, divided; 1 ounce, Pecorino Romano cheese, grated (½ cup), divided, plus extra for serving; 1½ teaspoons, table salt, divided, plus salt for cooking pasta; 1 teaspoon, grated lemon zest plus 1 tablespoon juice; 1 , garlic clove, minced; 1 pound, fusilli; 1 pound, ground lamb; ½ teaspoon, pepper; 1 cup, frozen peas, thawed